CN218381344U - Detection device - Google Patents

Abstract

The utility model discloses a detection device, this detection device are used for the simulation and detect battery monomer and include casing and temperature detector. The shell is provided with a cavity, the cavity is provided with an opening, and the shell is used for accommodating the electric core assembly and enabling the electric core assembly to cover the opening; a temperature detector is at least partially located within the chamber, the temperature detector for detecting a temperature within the chamber. The utility model discloses among embodiment's the detection device, the sub-assembly simulation battery monomer that electric core subassembly and casing assembled to detect this free temperature of simulation battery. A cavity structure is arranged on a shell of the detection device, and an opening is formed in the cavity. The electric core component can be directly placed in the chamber through the opening by the design, and the electric core component is portable in disassembly and assembly and easy to replace; in addition, the temperature detector is partially arranged in the chamber, so that the temperature in the chamber can be detected in real time, and the accuracy of the detected temperature is high.

Description

Detection device

Technical Field

The utility model relates to a lithium cell manufacture equipment technical field especially relates to a detection device.

Background

The safety and reliability detection of the lithium battery comprises the detection of the internal temperature of the battery cell. The temperature change inside the battery monomer is reflected in the temperature rise caused by internal resistance in the lithium ion extraction process in the battery cell in the battery monomer. The current safe and reliable detection cannot detect the temperature inside the single battery in real time, and is not beneficial to the testing of the single battery.

SUMMERY OF THE UTILITY MODEL

The utility model provides a detection device can solve the problem of unable real-time detection electric core subassembly inside temperature.

The utility model discloses embodiment's detection device is used for simulating and detects battery monomer and includes:

the shell is provided with a cavity, the cavity is provided with an opening, and the shell is used for accommodating the cell assembly and enabling the cell assembly to cover the opening;

a temperature detector at least partially located within the chamber, the temperature detector for detecting a temperature within the chamber.

The utility model discloses among embodiment's the detection device, the sub-assembly simulation battery monomer that electric core subassembly and casing assembled to detect this free temperature of simulation battery. A cavity structure is arranged on a shell of the detection device, and an opening is formed in the cavity. Such design can directly put into the cell subassembly in the cavity through the opening, and the dismouting is portable, easily the change of cell subassembly. In addition, the temperature detector is partially arranged in the cavity, so that the temperature in the cavity can be detected in real time, namely the temperature in the battery cell is obtained through simulation detection.

In some embodiments, the temperature probe is disposed through the housing and partially extends into the chamber.

So, temperature detector can stretch into in the cavity to the inside temperature of real-time detection battery monomer.

In some embodiments, the housing includes a bottom wall and a side wall connected to the bottom wall, the bottom wall and the side wall enclose the chamber, and the temperature detector is disposed on the side wall.

Therefore, the temperature detector can extend into the cavity from the side wall of the shell so as to detect the temperature inside the battery cell in real time.

In certain embodiments, the temperature probe comprises a thermocouple thermometer.

In this way, the temperature inside the battery cell can be detected in real time and automatically recorded.

In some embodiments, the detection device further includes a pressure detection component, the pressure detection component includes an air duct and a pressure gauge, the air duct is disposed on the housing in a penetrating manner, one end of the air duct extends into the cavity, and the other end of the air duct is connected with the pressure gauge.

So, through stretching into the cavity with the air duct inside, the utility model discloses embodiment's detection device can also detect the inside pressure of battery monomer to the pressure value that shows through the manometer in real time.

In some embodiments, the detection apparatus further includes a sampling assembly, the sampling assembly includes a first drainage tube and a first valve disposed on the first drainage tube, the first drainage tube is disposed on the housing and has one end extending into the chamber, the first valve is located outside the chamber, and the first drainage tube is configured to guide the liquid in the chamber to flow out of the chamber when the first valve is opened.

So, the liquid in the cavity can flow to the cavity outside through first drainage tube under the control of first valve, consequently, the utility model discloses embodiment's detection device can detect liquid outside the cavity.

In certain embodiments, the sampling assembly further comprises a sampler disposed at the other end of the first drain tube.

In this manner, the sampling assembly can store liquid flowing from the chamber into the first drain for subsequent testing.

In some embodiments, the sampling assembly further includes a second drainage tube and a second valve disposed on the second drainage tube, the second drainage tube is disposed on the housing and is close to the opening relative to the first drainage tube, one end of the second drainage tube extends into the chamber, and the other end of the second drainage tube is communicated with the sample storage device, the second valve is located outside the chamber, and the second drainage tube is configured to guide the gas in the chamber to flow to the sample storage device when the second valve is opened.

Thus, the gas in the chamber can flow into the sample storage device through the second drainage tube under the control of the second valve, so as to be detected later.

In some embodiments, the sampling assembly further comprises a constant pressure tube and a third valve disposed on the constant pressure tube, one end of the constant pressure tube is communicated with the sample storage device, and the other end of the constant pressure tube is communicated with the atmosphere.

Therefore, under the control of the third valve, the constant pressure pipe can ensure that the pressure at each position in the sampling assembly is uniform, and the flow distribution of liquid and gas in the sampling assembly is uniform and the movement resistance distribution of the liquid and the gas is uniform.

In certain embodiments, the housing has a see-through window through which the environment within the chamber is exposed.

In this way, the cell internal reaction can be visually demonstrated.

In some embodiments, a bearing table is formed on the edge of the opening of the housing, the bearing table bears an end cover of the electric core assembly, the end cover seals the opening, and the electric core of the electric core assembly is connected with the end cover and accommodated in the cavity.

So, the end cover is placed on the plummer and the involution opening can be so that electric core and cavity outside keep apart to guarantee that electric core does not receive external environment to disturb in the testing process, thereby guarantee the degree of accuracy of detection.

In certain embodiments, the detection device further comprises a gland removably coupled to an end of the housing, the gland pressing against the end cap when the end cap is resting against the load table.

So, the gland can compress tightly the end cover, prevents that the liquid in the cavity from volatilizing.

In some embodiments, the gland has a press-fit surface facing the housing, and a first seal ring is disposed between the gland and the end cap, the first seal ring sealing a gap between the press-fit surface and the end cap.

Therefore, the first sealing ring can seal a gap between the pressing surface and the end cover, and liquid in the cavity is prevented from volatilizing.

In certain embodiments, the gland has a press-fit surface facing the housing, and a second sealing ring is provided between the gland and the housing, the second sealing ring sealing a gap between the press-fit surface and the housing.

Therefore, the second sealing ring can seal the gap between the pressing surface and the shell to prevent the liquid in the cavity from volatilizing.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a sectional view of an assembly structure of a detecting device and an electric core assembly according to an embodiment of the present invention;

fig. 2 is a cross-sectional view of a housing of an embodiment of the present invention;

fig. 3 is a schematic structural view of a gland according to an embodiment of the present invention;

fig. 4 is a sectional view of the gland according to the embodiment of the present invention.

Description of the main element symbols: a detection device 100; an electric core assembly 210; a housing 220; a temperature probe 40; a chamber 221; an opening 310; an end cap 230; a temperature measuring section 41; a display unit 43; a first through hole 222; a bottom wall 223; a side wall 224; a pressure detection assembly 50; an air duct 51; a pressure gauge 53; a second through-hole 225; a sampling assembly 60; a first draft tube 61; a first valve 62; a third through hole 226; a sample storage 63; a second draft tube 64; a second valve 65; a fourth through hole 227; a constant pressure tube 66; a third valve 67; a carrier table 228; a catching portion 2280; a gland 70; the first bolt hole 71; a second bolt hole 229; a press-fit surface 73; a first seal ring 80; a first groove 75; a second seal ring 90; a second groove 2240.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first" and "second" may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The following disclosure provides many different embodiments or examples for implementing different features of the invention. In order to simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. Furthermore, the present invention may repeat reference numerals and/or reference letters in the various examples, which have been repeated for purposes of simplicity and clarity and do not in themselves dictate a relationship between the various embodiments and/or arrangements discussed. In addition, the present disclosure provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize applications of other processes and/or use of other materials.

In the mature technology of battery manufacturing, the cell assembly is enclosed in an aluminum casing to form a battery cell. When the temperature in the single battery is detected, the temperature of the aluminum shell can be measured only by sticking a thermal resistance thermometer on the aluminum shell, so that the temperature in the single battery is indirectly judged. The mode can not only obtain the temperature information in the single battery in real time, but also detect the temperature after heat conduction, so that the difference exists between the detected temperature information and the real temperature information in the single battery.

Meanwhile, when the pressure, electrolyte sampling and gas component sampling inside the single battery are detected, the single battery needs to be broken and disassembled. The electrochemical reaction of the broken and disassembled electric core assembly is immediately stopped, and further detection and sampling cannot be carried out. The sealed aluminum case is not directly observable, so that the electrolyte flow and gas distribution in the battery cannot be visually observed, which is not beneficial to the development and production of the battery.

In response to the above problems, researchers often adopt a parallel test method in the detection process to minimize errors in the test. In the parallel test, the same batch of battery cells is tested under completely consistent conditions (including temperature, humidity, instruments, reagents, and testers), and the results are consistent.

The inventor notices that if parallel tests are adopted for detection, the state consistency of each battery cell cannot be ensured, so that the analysis after detection is difficult.

As a result of intensive research, the inventors found that a PMMA (polymethyl methacrylate) material may be used as a case of the battery cell instead of aluminum to form a simulated battery cell, and a temperature sensor and a pressure sensor are disposed on the case, wherein the temperature sensor at least partially extends into the case.

Because the physical or chemical reaction of the electric core component is not influenced by replacing the shell, the detected data can represent the real data of the electric core component. This makes it possible to monitor temperature and pressure information within the cell in real time without breaking down the cell. And simultaneously, the utility model discloses embodiment's detection device can also dispose the valve and deposit appearance ware to the realization is to the continuous sample of interior gas composition of battery monomer and electrolyte.

Referring to fig. 1, fig. 1 is a sectional view of an assembly structure of a detection device and a battery pack according to an embodiment of the present invention. In the process of detecting the safety and reliability of the battery, the detection content of the battery cell mainly comprises the detection of the temperature, the pressure, the electrolyte component and the gas component inside the battery cell. The utility model discloses detection device 100 of embodiment can but not be used for the detection of the inside temperature of the battery cell of lithium cell, pressure, electrolyte composition and gas composition, can also be used for the detection of other similar structure batteries.

Referring to fig. 1 and 2, fig. 2 is a sectional view of a housing 220 according to an embodiment of the present invention. The detection device 100 of the embodiment of the present invention is used for simulating and detecting a battery cell and includes a housing 220 and a temperature detector 40. The housing 220 is provided with a cavity 221, the cavity 221 is provided with an opening 310, and the housing 220 is used for accommodating the electric core assembly 210 and enabling the electric core assembly 210 to cover the opening 310. A temperature probe 40 is at least partially located within the chamber 221, the temperature probe 40 being for detecting a temperature within the chamber 221.

Specifically, the battery cell refers to the smallest unit constituting the battery. In the embodiment of the present invention, the casing 220 and the electric core assembly 210 of the detecting device 100 simulate a battery cell.

The housing 220 may be a variety of shapes and a variety of sizes, such as rectangular parallelepiped, cylindrical, hexagonal prism, etc. Specifically, the shape of the housing 220 may be determined according to the specific shape and size of the electric core assembly 210. The material of casing 220 can be multiple, for example, copper, iron, aluminium, stainless steel, aluminum alloy, plastic etc. the preferred transparent material of embodiment of the utility model to the state of the interior electric core subassembly 210 of real-time observation cavity 221.

The cell assembly 210 is a component in which electrochemical reactions occur in the battery cells. The pressure inside the cell assembly 210 mainly comes from the increase of gas pressure caused by the rise of internal temperature during the charging and discharging of the cell, the temperature inside the cell assembly 210 mainly comes from the temperature rise caused by internal resistance in the lithium ion deintercalation process in the cell structure, and the gas components inside the cell assembly 210 mainly come from the decomposition of the electrolyte and the side reaction caused by electrochemical polarization.

The temperature detector 40 may be any thermometer that supports real-time detection and feedback of temperature information, the temperature detector 40 may include a temperature measuring unit 41 and a display unit 43, the temperature measuring unit 41 may be a unit for measuring temperature, and the display unit 43 may be a unit for displaying the measured temperature. The housing 220 may be provided with a first through hole 222, the first through hole 222 may be a hole penetrating through a sidewall 224 of the housing 220, and the temperature measuring part 41 may extend into the cavity 221 through the first through hole 222 to measure the temperature inside the battery cell. The display unit 43 can display the temperature information detected by the temperature measuring unit 41 in real time.

In addition, a sealant can be coated between the temperature measuring part 41 and the first through hole 222, so that the sealing performance of the cavity 221 can be ensured not to be damaged due to the arrangement of the first through hole 222.

In the detecting device 100 of the embodiment of the present invention, the assembly of the cell assembly 210 and the housing 220 simulates the single battery, and detects the temperature of the simulated battery. The housing 220 of the detection apparatus 100 is provided with a chamber 221 structure, and the chamber 221 is provided with an opening 310. Due to the design, the battery cell assembly 210 can be directly placed in the cavity 221 through the opening 310, and the battery cell assembly 210 is portable in disassembly and assembly and easy to replace. In addition, the temperature detector 40 is partially disposed inside the chamber 221, so that the temperature inside the chamber 221 can be detected in real time, i.e., the temperature inside the battery cell is obtained through simulation detection.

Referring to fig. 1, in some embodiments, the temperature probe 40 is disposed through the housing 220 and partially extends into the chamber 221.

Specifically, temperature measurement portion 41 of temperature detector 40 can stretch into cavity 221 through the first through-hole 222 of seting up on casing 220, and further, temperature measurement portion 41 can stretch into the clearance department between electric core subassembly 210 and casing 220, and temperature measurement portion 41 can stretch into in the electrolyte between electric core subassembly 210 and casing 220, also can stretch into in the gas space between electric core subassembly 210 and casing 220, the utility model discloses the embodiment does not do the restriction here.

In this way, the temperature probe 40 can detect the temperature inside the battery cell in real time through the temperature measuring part 41 extending into the cavity 221.

Referring to fig. 1, in some embodiments, the housing 220 includes a bottom wall 223 and a side wall 224 connected to the bottom wall 223, the bottom wall 223 and the side wall 224 define a chamber 221, and the temperature detector 40 is disposed on the side wall 224.

In particular, the housing 220 may be manufactured by an injection molding process, so that the connection between the bottom wall 223 and the side wall 224 is free of gaps. The cell assembly 210 can be placed on the bottom wall 223, a gap can be left between the cell assembly 210 and the side wall 224, the electrolyte generated when the cell assembly 210 reacts can be covered at the position of the side wall 224 close to the bottom wall 223, and the liquid level of the electrolyte can be determined according to the requirement.

The temperature measuring portion 41 of the temperature probe 40 may be inserted into any position of the side wall 224. For example, thermometry 41 may be inserted through sidewall 224 near opening 310 to measure the temperature of the gas space between core assembly 210 and sidewall 224. For another example, the thermometric section 41 may be disposed through the sidewall 224 near the bottom wall 223 to measure the temperature of the electrolyte between the cell assembly 210 and the sidewall 224.

In this way, the temperature probe 40 may detect the temperature inside the battery cell in real time through the temperature measuring part 41 protruding into the cavity 221.

Referring to FIG. 1, in some embodiments, the temperature probe 40 comprises a thermocouple thermometer.

Specifically, the thermocouple thermometer may include a thermocouple and a measuring instrument, and the thermocouple may contact the electrolyte or gas in the chamber 221 and display a measured value on the measuring instrument. Compared with a thermal resistance thermometer, the thermocouple thermometer can measure the change of temperature in real time and display the change on a measuring instrument, and meanwhile, the thermocouple thermometer can also automatically record the measured temperature.

Therefore, the temperature of the detected object can be obtained more accurately by directly contacting the thermocouple thermometer with the temperature of the detected object.

Referring to fig. 1, in some embodiments, the detecting device 100 further includes a pressure detecting assembly 50, the pressure detecting assembly 50 includes an air duct 51 and a pressure gauge 53, the air duct 51 is disposed on the housing 220, one end of the air duct 51 extends into the chamber 221, and the other end is connected to the pressure gauge 53.

Specifically, pressure measurement component 50 can be marketed or customized to arbitrary pressure tester that can show measured space pressure numerical value in real time, the embodiment of the utility model discloses the concrete model of pressure measurement component 50 is not restricted.

The housing 220 may be provided with a second through hole 225, the second through hole 225 may be a hole penetrating through a side wall 224 of the housing 220, the air duct 51 may be a pipe for communicating air with the pressure gauge 53, the air duct 51 may partially extend into the chamber 221 through the second through hole 225, and further, the air duct 51 may extend into a gap between the housing 220 and the electric core assembly 210. Before the cell assembly 210 starts to react, the air in the air duct 51 and the air in the chamber 221 are integrated, and the pressure gauge 53 displays the initial value at the time of detection. After the cell assembly 210 starts to react, the gas component generated by the reaction of the cell assembly 210 in the chamber 221 gradually increases, the air in the air duct 51 is compressed, and the pressure gauge 53 can record the change value of the pressure in the chamber 221 relative to the initial value in real time.

In addition, a sealant can be coated between the air duct 51 and the second through hole 225, so that the tightness of the chamber 221 can be ensured not to be damaged due to the arrangement of the second through hole 225.

So, inside through stretching into cavity 221 with air duct 51, the utility model discloses embodiment's detection device 100 can also detect the inside pressure of battery monomer to the pressure value that shows through manometer 53 in real time and record.

Referring to fig. 1, in some embodiments, the detection apparatus 100 further includes a sampling assembly 60, the sampling assembly 60 includes a first drainage tube 61 and a first valve 62 disposed on the first drainage tube 61, the first drainage tube 61 is disposed on the housing 220 and has one end extending into the chamber 221, the first valve 62 is disposed outside the chamber 221, and the first drainage tube 61 is used for guiding the liquid in the chamber 221 to flow out of the chamber 221 when the first valve 62 is opened.

Specifically, the sampling assembly 60 may be an assembly for collecting gas generated during the reaction of the electric core assembly 210 and electrolyte participating in the reaction. The sampling assembly 60 may be a plurality of sampling assemblies 60, the sampling assembly 60 may be a sealing structure to prevent volatilization of the electrolyte and leakage of gas, and the sampling assembly 60 may be made of a transparent material to observe the state of the collected electrolyte.

The housing 220 may be provided with a third through hole 226, the third through hole 226 may be a hole penetrating through a side wall 224 of the housing 220, the first drain 61 may be a pipe for allowing the electrolyte generated during the reaction of the electric core assembly 210 to flow to the first valve 62, the first drain 61 may partially extend into the chamber 221 through the third through hole 226, and further, the first drain 61 may extend into a gap between the housing 220 and the electric core assembly 210 and below the liquid level of the electrolyte. First valve 62 can be the part that is used for controlling first drainage tube 61 to communicate and block up, and first valve 62 can set up with casing 220 interval, and first valve 62 can be arbitrary model in the market, the embodiment of the utility model discloses the concrete model of first valve 62 is not restricted.

When the first valve 62 is in the closed state, the electrolyte is in a position between the bottom wall 223, the side wall 224 and the electric core assembly 210; when the first valve 62 is in an open state, the electrolyte flows out of the chamber 221 through the first drain tube 61 under pressure, and then the electrolyte can be sampled and analyzed.

In addition, a sealant can be coated between the first drainage tube 61 and the third through hole 226, so as to ensure that the sealing performance of the chamber 221 is not damaged due to the arrangement of the third through hole 226.

In this way, the liquid in the chamber 221 can flow out of the chamber 221 through the first drainage tube 61 under the control of the first valve 62, and therefore, the detection device 100 of the embodiment of the present invention can detect the liquid outside the chamber 221.

Referring to fig. 1, in some embodiments, the sampling assembly 60 further includes a sample holder 63 disposed at the other end of the first drain tube 61.

Specifically, the sample holder 63 may be a transparent device capable of accommodating the electrolyte and gas generated by the reaction of the electrode assembly 210, for example, the sample holder 63 may be made of PMMA. The sample holder 63 may be of various shapes and various sizes, such as rectangular parallelepiped, cylindrical, hexagonal prism, etc. The embodiment of the present invention does not limit the specific shape of the sample holder 63.

The sample storage 63 may be spaced apart from the housing 220, and when the first valve 62 is in an open state, the electrolyte generated by the reaction of the electric core assembly 210 may flow into the sample storage 63 through the first drainage tube 61.

In this manner, the sampling assembly 60 can store the electrolyte flowing from the chamber 221 into the first draft tube 61 for subsequent detection.

Referring to fig. 1 and 2, in some embodiments, the sampling assembly 60 further includes a second drainage tube 64 and a second valve 65 disposed on the second drainage tube 64, the second drainage tube 64 is disposed on the housing 220 and is close to the opening 310 relative to the first drainage tube 61, one end of the second drainage tube 64 extends into the chamber 221, the other end of the second drainage tube 64 is communicated with the sample holder 63, the second valve 65 is disposed outside the chamber 221, and the second drainage tube 64 is used for guiding the gas in the chamber 221 to flow to the sample holder 63 when the second valve 65 is opened.

Specifically, a fourth through hole 227 may be formed in the housing 220, the fourth through hole 227 may be a hole penetrating through a side wall 224 of the housing 220, the second draft tube 64 may be a pipe for allowing gas generated during the reaction of the cell assembly 210 to flow to the second valve 65, the second draft tube 64 may partially extend into the chamber 221 through the fourth through hole 227, and further, the second draft tube 64 may partially extend into a gap between the housing 220 and the cell assembly 210 and extend into a gas space. Since the cell assembly 210 is placed on the bottom wall 223 of the housing 220 so that the electrolyte is located away from the opening 310, the gas generated when the cell assembly 210 reacts is filled between the electrolyte and the opening 310, and therefore the second draft tube 64 is inserted into the housing 220 and is close to the opening 310 with respect to the first draft tube 61.

Similarly, the second valve 65 may be a means for controlling the communication and blockage of the second drain tube 64, the second valve 65 being proximate the opening 310 relative to the first valve 62. The second valve 65 can set up with casing 220 interval, and second valve 65 can be arbitrary model in the market, the embodiment of the utility model discloses the specific model of second valve 65 is not restricted.

In addition, a sealant can be coated between the second drainage tube 64 and the fourth through hole 227, so as to ensure that the sealing performance of the chamber 221 is not damaged due to the arrangement of the fourth through hole 227.

When the second valve 65 is in the closed state, the gas generated by the reaction of the electric core assembly 210 fills the cavity space between the electrolyte and the opening 310; when the first valve 62 is in the open state, the gas flows under pressure through the second draft tube 64 into the sampler, and the gas can then be sampled for analysis.

In this way, the gas in the chamber 221 can flow into the sample holder 63 through the second draft tube 64 under the control of the second valve 65 for subsequent detection.

Referring to fig. 1, in some embodiments, the sampling assembly 60 further includes a constant pressure tube 66 and a third valve 67 disposed on the constant pressure tube 66, wherein one end of the constant pressure tube 66 is connected to the sample reservoir 63, and the other end is connected to the atmosphere.

Specifically, the constant pressure pipe 66 may be a pipe for communicating the atmosphere, the third valve 67, and the sample reservoir 63, and the third valve 67 may be a component for controlling the flow of the gas and the electrolyte in the sampling assembly 60 through the constant pressure pipe 66.

In this manner, pressure balance tube 66, under the control of third valve 67, ensures uniform pressure throughout sampling assembly 60, and uniform distribution of the flow rates of the liquid and gas and the movement resistance of the liquid and gas within sampling assembly 60.

It can be understood that in the case of simultaneously opening the first and third valves 62 and 67 and closing the second valve 65, the electrolyte in the chamber 221 can be sampled through the first drain tube 61; with the second valve 65 and the third valve 67 simultaneously opened and the first valve 62 closed, the gas in the chamber 221 can be sampled through the second draft tube 64.

Referring to fig. 1, in some embodiments, housing 220 has a see-through window through which the environment within chamber 221 is exposed.

Specifically, through the see-through window, an inspector may externally observe the state of the electric core assembly 210 accommodated within the chamber 221. Further, the inspector may observe the flowing state of the electrolyte inside the chamber 221 and observe whether the electrolyte may be uniformly distributed inside the chamber 221.

The see-through window may be formed in the entire housing 220, or the housing 220 may be made of a transparent material, for example, the housing 220 may be made of PMMA. The see-through window may also be part of a structure provided on the housing 220. For example, a hole may be formed on the surface of the light-tight housing 220, and a transparent material may be inserted into the hole, so that the state of the electric core assembly 210 in the chamber 221 may be observed through the hole. In this way, the cell internal reaction can be visually exhibited.

Referring to fig. 1 and 2, in some embodiments, the housing 220 is formed with a carrying platform 228 at an edge of the opening 310, the carrying platform 228 carries the end cap 230 of the cell assembly 210, the end cap 230 seals the opening 310, and the cells of the cell assembly 210 are connected to the end cap 230 and are accommodated in the cavity 221.

Specifically, the end cap 230 refers to a member covering the opening 310 of the case 220 to isolate the internal environment of the battery cell from the external environment. Alternatively, the end cap 230 may be made of a material (e.g., an aluminum alloy) having a certain hardness and strength, so that the end cap 230 is not easily deformed when being extruded and collided, and thus the battery cell may have a higher structural strength and safety performance may be improved.

The housing 220 is an assembly for mating with the end cap 230 to form a chamber 221, wherein the chamber 221 is formed to accommodate the cell assembly 210, electrolyte, and other components.

The housing 220 and the end cap 230 may be separate components, and an opening 310 may be formed on the housing 220, and the shape of the opening 310 may be determined according to the cell assembly 210, but the embodiment of the invention is not limited thereto, and the end cap 230 covers the opening 310 at the opening 310 to form the cavity 221. Without limitation, the end cap 230 and the housing 220 may be integrated, and specifically, the end cap 230 and the housing 220 may form a common connecting surface before other components are inserted into the housing, and when it is required to encapsulate the interior of the housing 220, the end cap 230 covers the housing 220.

The platform 228 may be a flat surface formed on the sidewall 224 of the housing 220, and the width of the platform 228 may be the wall thickness of the sidewall 224. Load bearing platform 228 may include a catch 2280, and end cap 230 may be snapped into catch 2280 to enclose opening 310 of housing 220. The electric core and the end cap 230 of the electric core assembly 210 are fixedly connected, and the electric core and the end cap 230 are assembled in production, and during detection, the electric core assembly 210 is regarded as a detected piece of the detection apparatus 100 according to the embodiment of the present invention.

As such, placing the end cap 230 on the carrier table 228 and sealing the opening 310 can isolate the battery cell from the outside of the chamber 221, so as to ensure that the battery cell is not interfered by the external environment during the detection process, thereby ensuring the accuracy of the detection.

Referring to fig. 1 and 3, fig. 3 is a schematic structural diagram of a gland according to an embodiment of the present invention. In some embodiments, the test device 100 further includes a gland 70, the gland 70 being removably attached to the end of the housing 220, the gland 70 pressing against the end cap 230 when the end cap 230 is resting on the carrier 228.

Specifically, the pressing cover 70 may be a cover body made of a metal material, and the pressing cover 70 may have a certain thickness. The width of the gland 70 may be equal to the radial distance of the sidewall 224, the gland 70 may include a first bolt hole 71, the first bolt hole 71 may be a through hole extending through the gland 70 with a reverse thickness, the housing 220 may include a second bolt hole 229, the second bolt hole 229 may be recessed from the bearing platform 228 into the sidewall 224 of the housing 220, the length of the second bolt hole 229 depends on the type of the bolt, and the embodiments of the present invention are not limited thereto. However, the second bolt hole 229 should not communicate with the first through hole 222, the second through hole 225, the third through hole 226, and the fourth through hole 227 described above.

The end of the cover 70 remote from the bottom wall 223 and the housing 220 can be detachably connected by means of screws, and the cover 70 can be pressed against the end face of the end cap 230 on the side facing away from the carrier table 228. The cover 70 may be made of PMMA, as shown in fig. 3, the cover 70 may be a square-shaped structure, and the hollow portion is used for filling the electric core assembly 210.

In this manner, the gland 70 may compress the end cap 230, preventing evaporation of the liquid within the chamber 221.

Referring to fig. 1 and 4, fig. 4 is a sectional view of a gland according to an embodiment of the present invention. In some embodiments, the gland 70 has a pressing surface 73 facing the housing 220, a first sealing ring 80 is disposed between the gland 70 and the end cap 230, and the first sealing ring 80 may be a sealing member, such as a rubber ring, a silicone ring, or the like, for sealing a gap between the pressing surface 73 and the end cap 230.

Specifically, the pressing surface 73 may abut against an end surface of the end cap 230 on a side facing away from the bearing platform 228, and to facilitate the arrangement of the first seal ring 80, the pressing surface 73 of the gland 70 may partially abut against the end cap 230 and partially abut against the bearing platform 228. The gland 70 may include a first groove 75 recessed into the gland 70 from the crimping surface 73 of the gland 70, and the first groove 75 may be disposed on an end of the gland 70 proximate the end cap 230. A first seal ring 80 may be disposed in the first groove 75, the size of the first seal ring 80 depending on the size of the first groove 75 to seal the gap between the press-fit surface 73 and the end cap 230.

In this way, the first sealing ring 80 can seal the gap between the pressing surface 73 and the end cap 230, and prevent the liquid in the chamber 221 from volatilizing.

Referring to fig. 1 and 4, in some embodiments, the pressing cover 70 has a pressing surface 73 facing the housing 220, and a second sealing ring 90 is disposed between the pressing cover 70 and the housing 220, where the second sealing ring 90 may be a sealing member, such as a rubber ring, a silicone ring, or the like, for sealing a gap between the pressing surface 73 and the housing 220.

Specifically, the side wall 224 of the housing 220 may include a second groove 2240 recessed from the bearing table 228 into the side wall 224, and the second groove 2240 may be disposed at a position between the second bolt hole 229 and the end cap 230. A second seal ring 90 may be disposed in the second groove 2240, the size of the second seal ring 90 depending on the size of the second groove 2240 to seal the gap between the press-fit surface 73 and the housing 220.

In this way, the second sealing ring 90 can seal the gap between the pressing surface 73 and the housing 220 to prevent the liquid in the chamber 221 from volatilizing.

In a specific embodiment, the side wall 224 of the housing 220 in the detecting device 100 is provided with a pressure detecting assembly 50 and a temperature detector 40 at one end, and the pressure detecting assembly 50 and the temperature detector 40 are arranged at intervals; and the other end is provided with a sampling assembly 60.

During detection, a battery cell without a casing is placed in the casing 220 of the detection device 100 to simulate a battery cell. The end cap 230 is attached to the end surface of the side wall 224 of the housing 220 away from the bottom wall 223, the end cap 230 is pressed by the gland 70, the gap generated when the end cap 230 and the gland 70 are assembled is sealed by the first sealing ring 80 and the second sealing ring 90, and then the gland 70 is detachably connected with the housing 220 by means of bolts.

After the cell assembly 210 and the housing 220 are hermetically assembled, an external circuit can be connected to charge and discharge the cells and tests are performed. The sampling assembly 60 can be used to sample the substances generated by the reaction of the electric core assembly 210 during the testing process. With the first and third valves 62 and 67 being simultaneously opened and the second valve 65 being closed, the electrolyte in the chamber 221 may be sampled through the first drain tube 61; with the second and third valves 65 and 67 opened and the first valve 62 closed at the same time, the gas in the chamber 221 may be sampled through the second draft tube 64.

In the description herein, references to the description of the terms "one embodiment," "certain embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims (14)

1. A detection device for simulating and detecting a battery cell, the detection device comprising:

the shell is provided with a cavity, the cavity is provided with an opening, and the shell is used for accommodating the cell assembly and enabling the cell assembly to cover the opening;

a temperature detector at least partially located within the chamber, the temperature detector for detecting a temperature within the chamber.

2. The sensing device of claim 1, wherein the temperature probe is disposed through the housing and partially extends into the chamber.

3. The detecting device for detecting the rotation of a motor rotor as claimed in claim 2, wherein the housing comprises a bottom wall and a side wall connected with the bottom wall, the bottom wall and the side wall enclose the chamber, and the temperature detector is arranged on the side wall in a penetrating mode.

4. The test device of claim 1, wherein the temperature probe comprises a thermocouple thermometer.

5. The detection device according to claim 1, wherein the detection device further comprises a pressure detection assembly, the pressure detection assembly comprises an air guide tube and a pressure gauge, the air guide tube is arranged on the shell in a penetrating manner, one end of the air guide tube extends into the cavity, and the other end of the air guide tube is connected with the pressure gauge.

6. The detection device as claimed in claim 1, further comprising a sampling assembly, wherein the sampling assembly comprises a first drainage tube and a first valve disposed on the first drainage tube, the first drainage tube is disposed on the housing and has one end extending into the chamber, the first valve is located outside the chamber, and the first drainage tube is configured to guide the liquid in the chamber to flow out of the chamber when the first valve is opened.

7. The testing device of claim 6, wherein the sampling assembly further comprises a sampler disposed at the other end of the first drain tube.

8. The detection device according to claim 7, wherein the sampling assembly further comprises a second drainage tube and a second valve disposed on the second drainage tube, the second drainage tube is disposed on the housing and is close to the opening relative to the first drainage tube, one end of the second drainage tube extends into the chamber, the other end of the second drainage tube is communicated with the sample holder, the second valve is located outside the chamber, and the second drainage tube is configured to guide the gas in the chamber to flow to the sample holder when the second valve is opened.

9. The detection apparatus according to claim 7, wherein the sampling assembly further comprises a constant pressure tube and a third valve disposed on the constant pressure tube, one end of the constant pressure tube is communicated with the sample storage device, and the other end of the constant pressure tube is communicated with the atmosphere.

10. The testing device of claim 1, wherein the housing has a see-through window through which the environment within the chamber is exposed.

11. The detection device according to claim 1, wherein a bearing table is formed on an edge of the housing located at the opening, the bearing table bears an end cap of the cell assembly, the end cap seals the opening, and the cell of the cell assembly is connected with the end cap and accommodated in the chamber.

12. The test device of claim 11, further comprising a gland removably coupled to an end of the housing, the gland pressing against the end cap when the end cap is against the load table.

13. The test device of claim 12, wherein the gland has a press-fit face facing the housing, and a first seal is disposed between the gland and the end cap, the first seal sealing a gap between the press-fit face and the end cap.

14. The testing device of claim 12, wherein the gland has a press-fit surface facing the housing, and a second sealing ring is disposed between the gland and the housing, the second sealing ring sealing a gap between the press-fit surface and the housing.

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